Receptacle closure



May- 7, 1929. l.. G. LANGE REGEPTAGLE GLosHE Filed Q01.. 2l, 1927 lun--1".

INVNTOR L. G. LCI/nge;

Patented May 7, 1929.

UNITED STATES LOUVERN Gr. LANGE, 0F PASSAIC, NEW JERSEY.

RECEPTACLE CLOSURE.

Application led October 21, 1927. Serial No. 227,635.

This invention relates to bottle sealing de` vices and more particularlyto a bottle closure of simple design and construction that may be usedin various types of bottles and jars. i

In the manufacture of bottle caps, the tin plate or metal cap iscoatedwith an oil lacquer while in the flat state before drawing, shaping andthreading the cap. During the formation of the caps, the metal Hakes andbreaks the lacquer film which permits the contents of the container toget'under these flakes, when the caps are put in use, and set upcorrosion. W hen screw caps are employed as bottle closures they areusually sealed by placing a cardboard, feltboard or cork Washer ofresilient nature in thetop of the cap and this washer is faced withtinfoil or varnished paper about .005 in thickness to resistthe contentsof the container. The use of these washers is accompanied by severaldisadvantages, one of which is the added cost of the resilient board.

In packing goods that are sealed under vacuum pressure, rubber gasketsare now employed which are very expensive. rlhe product so packedfrequently will react with the lacquer coating on the metal cap and setup corrosion and rust. This ditiiculty is encountered particularly witholives. Cardboard Washers cannot be used in connection with goods packedunder vacuum pressure as most of the products sealed under vacuum areretorted under live steam or hot water and this Wets the cardboard anddestroys the resilience so that at the present time the use of rubbergaskets is the only feasible method of sealing goods packed under vacuumpressure.

According to my invention I provide a lining for a bottle cap or jarclosure consisting of a relatively thick sheet of paper, having athickness of about .006 to .008, and this paper is saturated with aflexible resilient Varnish. 'lhis varnished paper lined cap will standretorting and take the vacuum pressure without leaking and will also re'sist reaction with any commodity which is now being packed. llt may alsobe used in place of the thick cardboard washers now employed withproducts that are not packed under vacuum pressure and will prevent thecontents of the container from coming in contact with the cap where themetal has tlaked and broken the lacquer film and will thus preventcorrosion from this cause.

In forming the lining either of two methods maybe employed. In the firstmethod a thick sheet of paper around .006 to .008 is saturated with aflexible varnish which is resilient and is then coated on one side withone or two coats of a semi-resilient varnish that will resist thecontents of the container. The uucoated side of the paper is then gluedto the metal which has already been given the customary coating on bothvsides with oil lacquer. The cap is then drawn or shaped, and threaded orbeaded if necessary with the varnished paper on the inside of the capcompletely covering the entire inner surface of the cap so that thecontents of the container will come in contact with the liner when thecap is in use and will not contact with any portion of the metal cap.

As an alternative procedure, the paper may be glued to the metal beforeit is coated and then saturated with the varnish and coated. The lastcoating of the paper may be applied simultaneously with the coating ofthe metal thus eliminating the separate step of oil lacquering the tinplate. After the metal and paper lining have been prepared in thismanner, the cap may then be drawn or shaped, threaded and beaded in theusual manner. The lining after being saturated and coated with varnishhas a thickness of from .010 to .012 and is capable of producing ahermetic seal with or without vacuum pressure. It may thus be used inplace of the usual cardboard or cork washer employed with crown caps andhas the advantage over such washers that it contacts with and covers theentire inner surface of the cap efectually preventing the contents ofthe container from contacting with the metal cap causing corrosion ifthe lacquer film on the cap is broken. In addition, it will stand theusual retorting processes for processing the contents of containers andwill not lose its resilience. It is, therefore, capable of use inclosure members employed on commodities that are to be sealed undervacuum pressure in place ofthe rubber gaskets now employed and willprevent the contents of the container from contacting with the metal ofthe cap and will thus eliminate corrosion.

.ln the accompanying drawings I have illustrated several forms of theinvention. In the drawings,

It is an elevation, partly in section,

lll)

of a ja r or container provided with a beaded mouth showing a capapplied thereto with the lining of the present invent-1011 employed kinthe cap;

Fig. 2 is a sectional view of the cap shown in Fig. 1 prior' to itsapplication to the jar; v

Fig. 3 is a sectional view of a jar or closure with a threaded mouthshowing my invention applied to the cap; and,

Fig. et is a similar view of a bottle having a crown seal or cap withthe invention applied.

Referring to Figs. 1 and 2 of the drawings, the reference numeral 1designates a jar or container of conventional type having a bead 2formed around its mouth. This jar or container is adapted to be closedby a cap 3 which is provided with a flange or skirt 4 adapted to titover the bead and to be curled or rolled around the bead as indicated at5 in Fig. 1 of the drawings to retain the cap in position. In applyingmy improved lining to this cap. the lining is arranged on the inner sideof the cap as indicated at 6 and extends downwardlyY to the bottom ofthe flange a as indicated at 7 so that the entire inner surface of thecap is covered by the varnished paper and the contents of the containerare only able to contact with the varnished paper which will resistreaction and will prevent the contents from contacting with any portionof the metal cap. In Fig. 3 of the drawings, the container 8 is providedwith external threads around its mouth and the cap consists of a disc 9having a threaded flange 10. The varnished paper lining 11 is applied tothe cap before the cap is drawn and threaded and the lining extends overthe inner surface of the flange as indicated at 12.

Similarly in a crown seal, the cap 13, shown in Fig. 4 is provided witha lining 1l of varnished paper and the lining extends downwardly as at15, coextensive with the crimped flange 16y of the cap.

I claim:

1. A bottle closure comprising a metal cap and a fibrous lining arrangedin said cap and covering the entire inner surface thereof, said liningbeing impregnated with varnish.

2. A. bottle closure comprising a metal cap and a fibrous liningarranged in said cap, said lining being of sufficient thickness to forma seal and covering t-he entire inner surface of said cap, said liningbeing impregnated with varnish.

3. A bottle closure comprising a metal cap, and a lining for said cap,said lining consisting of paper from .006 to .008 thick, impregnated andcoated with varnish to form a lining of from .010 to .012, said liningcovering the entire inner surface of said cap.

et. A bottle closure comprising a metal cap having a coating of oillacquer, and a paper lining otl from .006 to .008 thickness glued to theinner side of said cap and Covering the entire inner surface thereof,said lining being impregnated with varnish and coated with a layer ofvarnish on its exposed surface.

In testimony whereof I atlix my signature.

LOUVERN G. LANGE.

